MY106641A - Method for positioning a light beam on a picture surface. - Google Patents

Method for positioning a light beam on a picture surface.

Info

Publication number
MY106641A
MY106641A MYPI90001776A MYPI19901776A MY106641A MY 106641 A MY106641 A MY 106641A MY PI90001776 A MYPI90001776 A MY PI90001776A MY PI19901776 A MYPI19901776 A MY PI19901776A MY 106641 A MY106641 A MY 106641A
Authority
MY
Malaysia
Prior art keywords
sensor
light
positioning
picture surface
light beam
Prior art date
Application number
MYPI90001776A
Inventor
-Ing Gunter Gleim Dipl
-Ing Jacques Chauvin Dipl
Original Assignee
Thomson Brandt Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of MY106641A publication Critical patent/MY106641A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/28—Arrangements for convergence or focusing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Facsimile Heads (AREA)
  • Laser Beam Processing (AREA)
  • Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
  • Tents Or Canopies (AREA)
  • Road Signs Or Road Markings (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)

Abstract

THE POSITIONING OCCURS BY MEANS OF A LIGHT SENSOR (2) LOCATED ON OR AT THE PICTURE SURFACE (1) WHICH (SENSOR) IS COVERED BY THE BEAM. IT IS THE TASK TO ELIMINATE THE INFLUENCE OF EXTERNAL LIGHT REACHING THE LIGHT SENSOR AND OF VARIATIONS IN THE INTENSITY OF THE LIGHT BEAM. THE BEAM IS ADJUSTED TO AN OUTPUT SIGNAL (U3) OF THE SENSOR (2) WHICH CORRESPONDS TO A MEAN VALUE BETWEEN TWO OUTPUT SIGNALS (U1, U2) OF THE SENSOR (2) BEING FULLY OR NOT AT ALL COVERED BY LIGHT. IN PARTICULAR FOR THE ASSESSMENT AND ADJUSTMENT OF THE COVERGENCE WITH A TELEVISION PROJECTION DEVICE.(FIG. 2)
MYPI90001776A 1989-10-13 1990-10-12 Method for positioning a light beam on a picture surface. MY106641A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3934229A DE3934229A1 (en) 1989-10-13 1989-10-13 METHOD FOR POSITIONING A LIGHT BEAM ON A PICTURE

Publications (1)

Publication Number Publication Date
MY106641A true MY106641A (en) 1995-07-31

Family

ID=6391418

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI90001776A MY106641A (en) 1989-10-13 1990-10-12 Method for positioning a light beam on a picture surface.

Country Status (11)

Country Link
US (1) US5235173A (en)
EP (1) EP0495816B1 (en)
JP (1) JP3139552B2 (en)
CN (1) CN1052763A (en)
AT (1) ATE132680T1 (en)
AU (1) AU6509590A (en)
DE (2) DE3934229A1 (en)
ES (1) ES2083463T3 (en)
MY (1) MY106641A (en)
TR (1) TR25042A (en)
WO (1) WO1991006177A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700204A1 (en) * 1997-01-04 1998-07-09 Thomson Brandt Gmbh Method of adjusting convergence on a projection television
US5872593A (en) * 1997-06-04 1999-02-16 Sony Corporation Apparatus and method for calibrating video displays about points within the viewable area
US6583814B1 (en) 1997-08-19 2003-06-24 Thomson Licensing Sa System for correction of convergence in a television device related application
US6496298B1 (en) 1999-10-26 2002-12-17 Xerox Corporation Bichromal beads having charge adjuvants therein
US6362915B1 (en) 1999-10-26 2002-03-26 Xerox Corporation Bichromal beads having crystalline materials therein
US6335818B1 (en) 1999-10-26 2002-01-01 Xerox Corporation Bichromal beads having electrolytes therein
EP1168847A1 (en) * 2000-06-29 2002-01-02 Sony Espana SA Projection apparatus and method of image projection

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085425A (en) * 1976-05-27 1978-04-18 General Electric Company Precise control of television picture size and position
DE3311971A1 (en) * 1983-03-31 1984-10-04 Siemens AG, 1000 Berlin und 8000 München Device for aligning video projections
JPS59184562A (en) * 1983-04-04 1984-10-19 Canon Inc Differential type light receiving sensor
US4683467A (en) * 1983-12-01 1987-07-28 Hughes Aircraft Company Image registration system
US4593308A (en) * 1984-04-27 1986-06-03 General Electric Company Automatic correction of centering and convergence errors in CRT displays
DE3874366T2 (en) * 1987-02-26 1993-02-11 Matsushita Electric Ind Co Ltd AUTOMATIC CONVERGENCE COMPARISON SYSTEM FOR COLOR TELEVISION PLAYBACK DEVICES.
JP2558459B2 (en) * 1987-04-15 1996-11-27 アルプス電気株式会社 Photoelectric detection circuit

Also Published As

Publication number Publication date
ES2083463T3 (en) 1996-04-16
TR25042A (en) 1992-09-01
DE3934229A1 (en) 1991-04-18
JP3139552B2 (en) 2001-03-05
JPH05501337A (en) 1993-03-11
AU6509590A (en) 1991-05-16
CN1052763A (en) 1991-07-03
DE59010039D1 (en) 1996-02-15
WO1991006177A1 (en) 1991-05-02
EP0495816B1 (en) 1996-01-03
US5235173A (en) 1993-08-10
ATE132680T1 (en) 1996-01-15
EP0495816A1 (en) 1992-07-29

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